mirror of
https://github.com/beard7n/bsdports.git
synced 2026-04-10 18:41:17 +02:00
55 lines
1.9 KiB
C
55 lines
1.9 KiB
C
revision 1.17
|
|
date: 2015-12-27 16:55:20 +0000; author: erouault; state: Exp; lines: +9 -3; commitid: 4yLOaM0uFVPyJBOy;
|
|
* libtiff/tif_next.c: fix potential out-of-bound write in NeXTDecode()
|
|
triggered by http://lcamtuf.coredump.cx/afl/vulns/libtiff5.tif
|
|
(bugzilla #2508)
|
|
|
|
Index: libtiff/tif_next.c
|
|
===================================================================
|
|
RCS file: /cvs/maptools/cvsroot/libtiff/libtiff/tif_next.c,v
|
|
retrieving revision 1.16
|
|
retrieving revision 1.17
|
|
diff -u -r1.16 -r1.17
|
|
--- libtiff/tif_next.c 29 Dec 2014 12:09:11 -0000 1.16
|
|
+++ libtiff/tif_next.c 27 Dec 2015 16:55:20 -0000 1.17
|
|
@@ -1,4 +1,4 @@
|
|
-/* $Id: tif_next.c,v 1.16 2014-12-29 12:09:11 erouault Exp $ */
|
|
+/* $Id: tif_next.c,v 1.17 2015-12-27 16:55:20 erouault Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1988-1997 Sam Leffler
|
|
@@ -37,7 +37,7 @@
|
|
case 0: op[0] = (unsigned char) ((v) << 6); break; \
|
|
case 1: op[0] |= (v) << 4; break; \
|
|
case 2: op[0] |= (v) << 2; break; \
|
|
- case 3: *op++ |= (v); break; \
|
|
+ case 3: *op++ |= (v); op_offset++; break; \
|
|
} \
|
|
}
|
|
|
|
@@ -106,6 +106,7 @@
|
|
uint32 imagewidth = tif->tif_dir.td_imagewidth;
|
|
if( isTiled(tif) )
|
|
imagewidth = tif->tif_dir.td_tilewidth;
|
|
+ tmsize_t op_offset = 0;
|
|
|
|
/*
|
|
* The scanline is composed of a sequence of constant
|
|
@@ -122,10 +123,15 @@
|
|
* bounds, potentially resulting in a security
|
|
* issue.
|
|
*/
|
|
- while (n-- > 0 && npixels < imagewidth)
|
|
+ while (n-- > 0 && npixels < imagewidth && op_offset < scanline)
|
|
SETPIXEL(op, grey);
|
|
if (npixels >= imagewidth)
|
|
break;
|
|
+ if (op_offset >= scanline ) {
|
|
+ TIFFErrorExt(tif->tif_clientdata, module, "Invalid data for scanline %ld",
|
|
+ (long) tif->tif_row);
|
|
+ return (0);
|
|
+ }
|
|
if (cc == 0)
|
|
goto bad;
|
|
n = *bp++, cc--;
|